Electric biveteb



.W. MORAVA.

ELECTRIC RIVETER.

APPLIcATloN msn $1111.22. |911.

Patented Nov. 11, 1919.

3 SHEETS-SHEET I.

Wiz! 7116,55

w. MoRAvA.

ELECTRIC RIVETER. APPLICATION FILED SEPT'. 22.1917.

1 ,32.1 1 36'. I Patented Nov. 11, 1919.

3 SHEETS-SHEET 2.

W. IVIORAVA.

`ELECTRIC RIVETER.

APPLICATION FILED SEPT. 22. i9I I.

Patented Nov. 11, 1919.

3 SHEETS-SHEET 3.

f Inl/@awp WENSEI. MoRAvAQ orcHIcAeo, ILLINOIS.

ELECTRIC nIvrfrEat.

Specication of Letters Patent.

Patenten Nov. 11i, 191e.

y Application filed September 22, 1917. Serial No. 192,647. 4

To all whom it may concern Be it known that I, WENsEL MoRAvA, a citizenof the United States, residing at Chicago, in jthe county of Cook andState `of 5 Illinois, have invented a certain new and useful Improvementin Electric Riveters, of

' which the'following is a speciication.

My invention relates to` improvements in electric riveting machines andhas for one object to provide an arrangement. whereby by the meremanipulation of the lever the plunger may be worked back and forthagainst the work just as it can be .worked when a steam or air riveteris used.v Another object is for easily` and conveniently manipulatingthe driving mechanism and associated parts. Another object of myinvention is toprovidea riveter which will be` automatic in itsoperation in exactly the same sense as steam or air riveter isautomaticthat is Ito say in which one movement of the'control lever bythe operator will be sufficient to completely control all theoperating-parts. l 4My invention'.is illustrated more 0r lessdiagrammatically inV the accompanying drawings wherein Figure l is aside elevation; Y Fig. 2 is a section on an enlarged scale on' 3o theline 2 2 of Fig. -l;

FFig 3 is a section on the line 3 3 of ig. 2; Fig. 4 .is a section onthe line 4 4 of Fig. 5 isa longitudinal section ofthe planetary gear;

Fig. 6 is a section on the line 6 6 of Fig. 5.

Like parts are indicated b-y like letters 40 throughout'the severaligures.

Mechanical de tai-ls.

A is the. usual type of rigid jaw construe? ztion, onl the lower memberof which is mounted an anvil barA1. The upper member or part of the jawcarries a guide' head .A2, in which is slidably mounted the plu'nger A3carrying a screw threaded adjust# ment therein and a'driving bar A1 witha 5o rivetformng headlA5 in opposition tothe end of the anvil bar A1.

v B1 is a bracket extending rearwardly from thel jaw A vcarrying anelectric Imotor B2 which drives the shaft B4. The shaft and theb-racketB6.

C is a sleeve rotatably2mounted on the shaft B4 and in turn rotatablymounted in 60 bearingsleeves C1 C2 in a housing C3 on the jaw A. Thecentral portion ofthe sleevel C carries a driving wor-m C5 provided withthrust ball bearings indicated. This worm' islin mesh with the wormWheel C7 inthe 65 casing C8 supported on the housing C3. The worm wheelis mounted on and drives a shaft C9.

Crank disks D D are mounted one at each end of the shaft C9 and driving.links D1 are 70 pivoted one to each of said disks. These linksare'pivoted on a knuckle pin D2 which pin is supported inthe tension'toggle links D3 pivoted one at either side of the head A2.

D'1 is a thrust pin pivoted on the knuckle '75 pin intermediate its endsand rotatably engaging the upper end of the plunger A3` there being asindicated.

E is the driving portion of an electromagnetic clutch. .It is rigidlymounted on and always rotates with the shaft B4 and is provided withslip-rings FEF2 whereby electric l current is supplied to the clutch. E3is the a cylindrical bearing provided driven portion of this clutchaudit is rig- `idly mounted on the sleeve C so as to always F is aplanetary gear or transmission housing containing a planetary gear, the\member F10 ot which is secured against ro- 90 tation in`relation to the.shaft`B4.v By its engagement with the pinions F11 it rotates the sleeveC by rotating its enlarged end or sleeve C1- as illustrated in Fig. 5.The sleeve C is then rotated in the same direction as the shaft B4.

The pinions F11. are rotatably mounted on pins F12,set in the brake drumF5 which normally revolves with the planetary gear. The brake drum, when-the brake band F6 is 100 tightened upon it by means of the hand leverF9, being then held against rotation, prevents the rotation .of thepinions F11 about the axis of rotation of B1. Their rotation on the pinsF12 continues, and the gear C10 with the sleeve C is thus rotated inreverse direction to the rotation of B4.

Electric details.

ing from the other point to a solenoid I5.

IG is a conductor leading from the solenoid to the motor. YWhen vtheswitch is closed the current passes through the motor and through thesolenoid andthe shaft is rotated.

This is the normalpperating condition.

The conductors I KIrlfals'o communicate with terminals I7 I8 supportedon the member A. Knife switch membersI 11 are mounted on the lever F9 inoppositionxto the niemi bers I7 I8.

K is a conductor leading from the memu ber I9 to the brush K1 inengagement with the slip ring E1. K2 is a brush engaging the slip ringE2 and K3 is a conductor leading therefrom to a normally closed switchmetrically opposed on one of the membersl K4. K5 is a conductor leadingfrom this closed switch K4 to the terminal member I1".y

' .thus closing the electric circuit through the clutch. `K6 K7 areinsulation buttons dia- D adapted' to engage the inger'Ks on the switchK4 to break the clutch circuit at each half revolution of the' crankdisk D. K9 is a shunt circuit extending across the 40 switch K4 adaptedto be closed by the operator who presses on the thumb piece K10 tovclose the switch I 11.

. The circuit is also broken intermediate the ends -of the conductor Kby a switch L which is .controlled by the plunger L1 of the solenoid I5,which holds it against the compressed spring L2. This plunger alsoserves as a latch to hold the lever F against rotation resisting thespring L? whichtends- 50. yieldingly to thrust it away the parts beingis broken.`

so arranged that when the current in the motor exceeds a certainpredetermined point the solenoid plunger will be withdrawn, the clutchcircuit will be broken at the point 55 L and the lever will then bethrust'out by the spring thus breaking the circuit also at I7 I8. Anysuitable means not shown may be used to hold the plunger L14 in eX-tended position whilev the solenoid circuit The use and operation of myinvention `are as follows :--.l

When the motor circuit is closed as indicated the motor rotates, thedrive Ashaft rotates with it. The main control lever will normally be inopen position? and the crank diskwill normally be in such position thatthe insulation pins on it break the lclutch circuit. The'operator willthen push in on the lever to close the clutch circuit at the two pointswitch on the lever.y He then positions his work and presses on thebutton 7 on the lever handle. This short circuits the crank disk controlswitch and starts rotation of the crank disk. Immediately the insulationbutton goes out of action and the clutch circuit is closed across thespring held switch the operator may release the button. The crank diskwill rotate and the plunger will descend until it reaches the end of itsexcursion when the button on the crank disk will again break the clutchcircuit. The operator then touchesthe button on the lever and the crankdisk makes a second half revolution releasing the work.

If, however, theload is so great that there is danger to the motor andassociated parts there will be a surge of current in the motor circuitand the solenoid therein will be excited. This will cause the solenoidto draw back on the plunger and first breakthe erator can drive in the'lever again closing4 the circuit and causing the forward Inovement.Ifthis is not enough to do the workA he can pull out on the leveragainreverse the rivet driving mechanism and start it again. -In otherwords,V by -pumping the y,

lever back and forth the operator can move the plunger back and forth,can pound on the rivet and in this way be sure of driving it' because,of course, since the parts are relatively heavy even any slight movementwill store a very considerable amount of energy such as will underordinary circumstances be sufficient to drive the rivet. This operationtakes place without manipulation of the button on the lever because thatbutton is needed to bridge the gap only when the. crank disk is at itsinnermost or its outermost position, that is to say, manipulation of thelever is needed to cause move-v ment of the plunger only at the two endsof its stroke. e

The circuit breaker is made up of a switch plunger carrying a Contactsection adapted to engage a fixed contact member.' It'is normally7thrust in one direction by a spring and locked against movement by 'alatch on the end of the solenoid plunger'.y :When

the overload in the motor circuit exceeds a certain predetermined .pointthe plunger is withdrawn from the latch and the spring nannies m cThe-'operator 'then manipulatesl vthe master lever pulling it out tofirst open the'main switch'and break the main-'clutch circuit: 1n4another place. He pulls. it out, farther `5 to operate the reverse.`

t I claim:

l. 'An electric riveting 'machine comprising a motor, a lrivet drivingplunger, a drive wheel permanently' connected thereto, a

clutch and a reversing gear interposed between the motor and the drivewheel anda controlling lever adapted when moved in one direction tothrow the reversing gear into operationl and when moved inthe otherdirection to throw the clutch linto operation, a mechanical connectionbetweengthelever and the reversing gear and an electrical conl nection.between the 'lever 'and the clutch.

2., Anelectric rivetin machine comprising a motor, a rivet drivingplunger, a drive wheel permanently connected thereto, a c' clutch and areversing gear interposed bevtween the motor and the drive wheel andacontrolling lever adapted when moved in one direction to throw .thereversing gear into operation and when moved in the other direction tothrow the'clutch into operation, yielding means tending to Aforce thecontrolling lever out of the' clutch operatin position, locking meansfor keeping sai yielding means in inoperative position, and

means responsive to an'overload on the motor for releasingsaid yieldingmeans.

' 3. An electric, `riveting machine compris- 35 ing a motor, a rivetdriving plunger, a drive wheel permanently connected thereto, a

clutch and a reversing gear, interposed vbetween the motor and the'drivewheel and a controlling lever adapted when moved Iin i 40 one directionto throw-'the reversing gear into operation and when moved in the otherdirection to throw theclutch into operation,

' a mechanical connection between the lever `and the reversing gearand-anelectrical connection between the lever and the clutch,

yielding -means tending to force the controlling lever 'out of theclutch operating position,locking means for. keeping said yielding meansin inoperative position, and means responsive to an overload on themotor for releasing said yielding means.

4. An electric rivetin tween the motor andthe drive wheel and acontrolling lever adapted when moved in onel direction to throw thereversing gear into operation and when moved in the other direction tothrow the clutch into operation,

yielding means tending vtof-force the controlling lever out'of theclutch operating position, `locking means for keeping `said yieldingvmeans in inoperative position, land meansre'sponsive tocan overload onthe momachine compris- 4 ing a motor, a-rivetdrivin'g plunger, adrivewheel permanently connected thereto'yi 'a 1 55 clutch and a reversinggear interposed being a motor, a rivet driving plunger, adrive wheel'permanently connected thereto, a clutch and a reversing gear interposedbetween the motor and the drive wheel and a controlling lever adaptedlwhen inoved in .one direction to throw the reversing gear intooperation and when moved in the other direction to throw the clutch intooperation,

a mechanicalfconnection between the levei` and the reversingl gear andan electrical connection'between' the lever and the clutch, yieldingmeans tending to force the controllinglever out of the clutch operatingposition, locking means for keeping said yielding means in inoperativeposition, and means responsive to an overload on they motor forreleasing said yielding means, saidreleasing meanslcomprising a solenoidin series with the motor circuit and a plunger controlled by thesolenoid. Y 6. An electric riveting machine comprising a motor, a rivetdriving plunger, a

drive wheel permanently .connected thereto, a clutch and. a reversinggear interposed be- I'rate from the lever and means responsive to anoverload in the motor circuit for opener/ ing said switch.

7. An electric riveting machine comprising amotor, arivetdrivingplunger, a drive wheel permanently connected thereto, a clutchand a reversing gear interposed be- `tween the motor and the drivewheel'and a controlling lever adapted when moved in one direction tothrow the reversing gear into operation and when moved in the otherdirection to throwthev clutch into operation, a mechanical connectionbetween the lever and the reversing Oear and anelectricalconnection'betweenthe lever and the clutch,

-a switch in"the clutch circuit separateA from Ithe lever and means1responsive to an over- 12,0 "load-in thekmotor circuit for opening saidswitch, means tending normally to throw the lever out of the clutchoperating position, means resisting sail` .lever throwing means, theswitch breaking means adapted simultaneously to release the leverthrowing means. f f

8. An electric riveting machine comprisv ing a motor, ay rivet drivingplunger, a drive :wheel permanently connected thereto, an 130 electricalclutch interposed between the motor and the drive wheel and a mechanicalreversing gear interposed between them, a lever adapted to control themechanical reversing gear, a switch mounted on the lever controlling theclutch circuit, and an auxiltor and the drive wheel and a mechanical.reversing gear interposed between them, a

iary switch controlling the clutch circuit independent of the lever.

9. An electric riveting machine comprising a' motor, a rivet drivingplunger, a drive wheel permanently connected thereto, an electricalclutch interposed between the motor and the drive wheel and a mechanicalreversing gear interposed between them, -a lever adapted to control themechanical reversing gear, a switch mounted on the lever controlling theclutch circuit, an auxiliary switch controlling the clutch circuitseparate from the lever, and means for opening said auxiliary switchindependent of the lever and Y lever controlled means for closing it.

10. An electric riveting machine comprising a motor, a rivet drivingplunger, a drive 'w Aeel permanently connected thereto, an lelectricalclutch interposed between the moleve,r adapted to control the mechanicalreversing gear, a switch mount-ed on the lever controlling the clutchcircuit, an auxiliary switch controlling the clutch circuit separatefrom the lever, yielding means tending normally to throw the lever int-oa neutral position to open the switch, locking means for holding theyielding means in the closed position with the switch closed.

l 11. An electric'riveting machine comprising a motor, a rivet drivingplunger, a drive wheel permanently connected thereto, an-

electrical clutch interposed between the mo- 'tor and the drive Wheeland a mechanical reversing gear interposed between them,la lever adaptedto control.l the mechanical reversin gear, a switch mounted on the levercontro ling the'clutch circuit, an auxiliary switch controlling theclutch circuit sep- .arate from the lever, yielding means tend- T ingnormally to throw the lever into Ia ,electrical clutch interposedbetween the motor and the drive wheel and a mechanical reversing gearinterposed between them, a

` lever adapted to control-the mechanical reversing gear, a switchmounted on the lever controlling the clutch circuit, an auxiliary'switch controlling the clutch circuit separatefrom the lever, yieldingmeans tending normally to throw the lever into a neutral position toopen the switch, locking means for holding the yielding means in the,closed position with the switch closed, comprising a solenoid andplunger adapted to control the auxiliary switch and to release theyielding means responsive to an overload on 'the motor circuit.

13. An electric riveting machine comprising a-motor, a rivet drivingplunger, a drive wheel permanently connected thereto, an electricalclutch interposed 'between the motor Aand the drive wheel and amechanical reversing gear interposed between vvthem, a lever adapted tocontrol the mechanical reversing gear, a switch -mounted on the levercontrolling 4the clutch circuit, a circuit break- .ing apparatus adaptedto break the clutch circuit responsive to an overload in the motorcircuit comprising a solenoid and a circuit breaking spring operatingplunger and means responsive to the movement of the lever after theswitch has been broken thereby closing the circuit breaking switch andsettin it ready for further operation. V

14. n an electric riveting machine comprising a motor, a rivetdrivingplunger, a

i drive wheel permanently connected thereto, an electric clutch and amechanical reversing gear interposed between the lmotor and the drivewheel, a controlling lever adapted mechanically to control the reversinggear, and a switch on the lever adapted to control the electric clutch.

15. In an electric riveting machinecomprising amotor, a rivet drivingplunger, a drive wheel permanently connected thereto, an electric clutchand a mechanical reversing gear interposed between the motor and thedrive wheel, a controlling lever adapted mechanically to controlthe-reversing gear, and a switch on the lever adapted to control theelectric clutch, said switch acting independently of the position of thelever.

16. In an electric riveting machine comprising a motor, a rivet drivingplunger, a

drive wheel permanently connected thereto, an electric clutch and amechanical reversing ear'interposed 'between the motor and the rivewheel, a controlling lever adapted mechanically to control `thereversing gear when rotated in one direction, said' lever bearing switchcontacts adapted when the lever is rotated in the opposite direction toclose the electricclutch circuit, and a switch on. the lever adapted tocloseV the electric clutch circuit, said switchA acting independently ofthe position of the lever.

17. An electric riveting machine comprising a motor, aVv rivet drivingplunger, a drive p wheell permanently connected thereto, a clutch and areversing gear interposed between the motor and the drivewheel and-,a

controlling device adapted when moved in one direction to throw thereversing gear into operation and when moved in the other direction tothrow the clutch into operation, a mechanic-a1 connection between thelever and the reversing gear and an electrical connection 'between thelever and the clutch, a

switch in the clutch circuit separate from the lever, means normallyinoperative for opening said switch, and means responsive to an overload'in ythe motorJcircuit for making said means operative.

18. An electric riveting machine comprising a motor, a rivet drivingplunger, a drive wheel permanently connected thereto, a clutch and areversing gear interposed between the motor and the drive wheel andcontrolling lever adapted when moved in one direction to throw, thereversing gear into rection to throw the clutch into operation', a

mechanical conne'ctionvbetween the lever and f the reversing gear and anelectrical connection between the lever and the clutch, a switch in theclutch circuit separate from the lever, yielding means normally lockedininactive position, for opening said switch, and means responsive to anoverload in the'motor circuit for releasing said yielding means.

In testimony whereof, I aiix my signature in the presence of twowitnesses this 4th day of September 1917.

wENsEL MoRAvA.

Witnesses:

LAUREL M. DoREMUs, MINNIE M. LINDENAU.

.operation'and when moved in theother di-

